How do I change the default location Blender opens when I want to install an add-on from file?
Ohh I see. So to change this, you may want to go to the File tab in the USER PREFERENCES. To change the location Blender defaults to installing add-ons from, you need to change the location of the render cache. This can be done by clicking on the Render Cache file preferences in the file tab, and choosing a location in your computer or on an external drive. This should solve your problem.